Off axis guiding is the best bet for imaging with the RC8. I was at one stage using a guide scope but on a heavier mount. If you want to persist I used parrallax rings and a couple of losmandy bars which I drilled holes suitable for holding everything. However, it will be cheaper for you to use an OAG so long as it is good quality.
Hey Robin, thanks for the reminder to remove a few pages off my site. Some things are getting a bit dated now. That is one page that needs removing.
